Contact us
Choose a category below so we can get back to you as quickly as possible.
甲的工作效率為:3÷40=340,乙的工格效率為:4÷30=430,甲乙工作效率的比為:340:430=9:16,故選:C.
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.